Method of coating tubular articles by immersion



Aug. 26, 1924. M. LOWY TING TUBULAR ARTICLES BY IMMERSION METHOD OF COA Filed April 18 Z V l/Vl/E/VTUI? ATTO NE A Patented Aug. 26, 1924.

UNITED STATES MORRIS LOWY, OF NEW YORK, N. Y.

METHOD OF COATING TUBULAR ARTICLES BY IMMERSION.

Application filed April 18, 1922. Serial No. 555,381.

To all whom it may concern:

Be it known that I, Moinns LowY, a citizen of the United States, and resident of the city of New York, in the county of Kings and State of New York, have invented certain new and useful Improvements in a Method of Coating Tubular Articles by Immersion, of which the following is a specification.

The present invention relates to a method of coating tubular objects by immersing or dipping the same in a bath of liquid coating material. The invention pertains more particularly to a method of coating tubular objects of substantially U-shape, such as, for instance, the head and foot pieces of metallic bedsteads.

The head and foot pieces of metallic bedsteads are usually painted by dipping the same into a bath of coating material, after the same have been assembled, but before the casters are mounted thereon. The lower ends of the vertical posts of these bedstead elements are thus open, so that, when the same are dipped, the coating material enters the tubular elements, whereby they are not only exteriorly but also interiorly coated. As there is no necessity of coating these elements interiorly, great waste of coating material is the result.

The main object of the present invention is to provide a method of coating substantially U-shaped tubular articles, whereby only a small portion thereof is coated interiorly, thus saving coating material.

Another object of the invention is to coat tubular objects in a simple and economical manner, and to provide a process for which very little apparatus is necessary, and such apparatus as is used is comparatively inexpensive and easy to operate.

Generally speaking, the present method of coating substantially U-shaped tubular articles consists in immersing or dipping the said articles in a bath of coating mate rial in positions in which the coating material cannot enter the article, or in other words so that the open ends of the tube or tubes are not submerged, and then dipping, in vertical or nearly vertical position, the article into the coating material with its open ends downwards to a level to coat the previously unsubmerged portions of the article.

Two of the many possible apparatuses for 13 of the tanka substantial distance below the open top thereof and adjacent one of the ends 14 of the same. The normal level of the coating material extends to or a slight distance above the support 12. The width of the tank exceeds somewhat that of the end piece 15 of the bedstead to be coated,

and, similarly, its length is somewhat greater than the height of the said end piece.

As shown in Fig. 2 of the drawings, the end piece of the bedstead consists of two vertical standards 16, connected at their upper ends by a transverse member 17, which is shown made integral with the said standards, although this is not essential. The standards and the said transverse connecting member are tubular, the lower ends 18 of the standards being open. A transverse horizontal tubular member 19 connects the standards a substantial distance above their open ends, and the transverse members 17 and 19 are connected by vertical bars 20. The particular construction of the end member of the bedstead may be varied accor 3 ing to the requirements, the one herein disclosed being shown for purposes of illus tration only. 1

The method of coatin the tubular article herein described is as to lows: The bedstead member is placed in an inclined position into the coating material holding tank 10, the transverse end member 17 resting on the bottom 21 of the tank and the open ends of the standards 16 on the support 12, the said open ends projecting above the support, as clearly shown in Fig. 1 of the drawin s. Obviously, thus only that portion of t e bedstead member is coated which is immersed in the liquid coating material. Inasmuch as the open ends of the standards portion.

16 project above the liquid, the latter will not find its way into the bedstead member. The bedstead member is then taken hold of by suitable means and shifted to vertical position with the open ends of the standards lowermost, and the said openends immersed in the liquid, in vertical or nearly vertical positions as shown in Fig. l of the drawings, whereby those portions of the standards, which were left uncoated in the first step at the coating operation, are coated. In the second step of the coating operation the immersed portions of the standard 16 are coated both interiorly and exteriorly Inasmuch as thus only small portions of the bedstead members are coated interiorly, great saving of the coating material is obtained.

The modified apparatus shown in Fig. 3 of the drawings differs from the one above described in that a portion of the bottom of the tank. denoted by the numeral 22, is inclined and the support 12 is made integral with the highest section of said bottom The method described in Connection with theapparatus shown in Fig. 3 of the drawings is carried out in the same manner as with that illustrated in Figs. 1 and 2.

What I claim is l. The method herein described of coating substantially U-shaped tubular objects, which consists in immersing-the major portion of the object in a bath of coating material with its open ends projecting above the coating material, and then dipping the open ends of" the objectinto the coating material so as to coat those portions thereof which were left uncoated during the first immersing step.

E2. The method herein described of coat-- ing substantially U-shaped tubular objects, which consists in immersing the major portion of the object in a bath of coating material with its open ends projecting above the coating material, and then dipping in substantially vertical position the open ends of the object into the coating material so as to coat those portions thereof which were left ,uncoated during the first immersing step.

Signed at New York, in the county of New York, and State of New York, this 12th day of April, A. D. 1922.

MORRIS LOWY. 

